81 lines
2.8 KiB
C++
Executable File
81 lines
2.8 KiB
C++
Executable File
/**********
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This library is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by the
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Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)
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This library is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
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more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this library; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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**********/
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// "liveMedia"
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// Copyright (c) 1996-2016 Live Networks, Inc. All rights reserved.
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// RTP source for 'ADUized' MP3 frames ("mpa-robust")
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// Implementation
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#include "MP3ADURTPSource.hh"
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#include "MP3ADUdescriptor.hh"
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////////// ADUBufferedPacket and ADUBufferedPacketFactory //////////
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class ADUBufferedPacket: public BufferedPacket {
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private: // redefined virtual functions
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virtual unsigned nextEnclosedFrameSize(unsigned char*& framePtr,
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unsigned dataSize);
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};
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class ADUBufferedPacketFactory: public BufferedPacketFactory {
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private: // redefined virtual functions
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virtual BufferedPacket* createNewPacket(MultiFramedRTPSource* ourSource);
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};
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///////// MP3ADURTPSource implementation ////////
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MP3ADURTPSource*
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MP3ADURTPSource::createNew(UsageEnvironment& env, Groupsock* RTPgs,
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unsigned char rtpPayloadFormat,
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unsigned rtpTimestampFrequency) {
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return new MP3ADURTPSource(env, RTPgs, rtpPayloadFormat,
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rtpTimestampFrequency);
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}
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MP3ADURTPSource::MP3ADURTPSource(UsageEnvironment& env, Groupsock* RTPgs,
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unsigned char rtpPayloadFormat,
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unsigned rtpTimestampFrequency)
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: MultiFramedRTPSource(env, RTPgs,
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rtpPayloadFormat, rtpTimestampFrequency,
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new ADUBufferedPacketFactory) {
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}
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MP3ADURTPSource::~MP3ADURTPSource() {
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}
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char const* MP3ADURTPSource::MIMEtype() const {
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return "audio/MPA-ROBUST";
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}
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////////// ADUBufferedPacket and ADUBufferredPacketFactory implementation
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unsigned ADUBufferedPacket
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::nextEnclosedFrameSize(unsigned char*& framePtr, unsigned dataSize) {
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// Return the size of the next MP3 'ADU', on the assumption that
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// the input data is ADU-encoded MP3 frames.
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unsigned char* frameDataPtr = framePtr;
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unsigned remainingFrameSize
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= ADUdescriptor::getRemainingFrameSize(frameDataPtr);
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unsigned descriptorSize = (unsigned)(frameDataPtr - framePtr);
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unsigned fullADUSize = descriptorSize + remainingFrameSize;
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return (fullADUSize <= dataSize) ? fullADUSize : dataSize;
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}
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BufferedPacket* ADUBufferedPacketFactory
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::createNewPacket(MultiFramedRTPSource* /*ourSource*/) {
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return new ADUBufferedPacket;
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}
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